<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>后盾人</title>
  </head>
  <body></body>
  <script>
    let hd = {
      name: "后盾人",
      lesson: {
        title: "javascript"
      }
    };
    let {
      name,
      lesson: { title }
    } = hd;
    console.log(name, title);
    // let { title } = {
    //   title: "javascript"
    // };
    // console.log(title);
  </script>
</html>
